mysql2 gemインストール時のトラブルシュート - QiitaFetching mysql2 0.5.2 Installing mysql2 0.5.2 with native extensions Gem::Ext::BuildError: ERROR: Failed to build gem native extension. current directory: /Users/name/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/mysql2-0.5.2/ext/mysql2 /Users/name/.rbenv/versions/2.5.3/bin/ruby -r ./siteconf20181128-2670-lgcxlu.rb extconf.rb checking for rb_absint_size()... yes checking for rb_absint_singlebit_p
